Electro-magnetic door-opener



(No Model.)

B. A. WILDT.

BLEUTRO MAGNETIC DOOR OPENER.-

Patented Nov. 20

UNITED STATES PATENT Fries,

EDIVARD A. WILD'I, OF LONG ISLAND CITY, NE? YORK.

ELECTRO- MAGNETIC DOOR=OPENER.

SPECIFICATION forming part of Letters Patent No. 393,282 dated November 20, 1888.

Application filed June 20, 1888. Serial No. 277,678.

To all whom, it may concern..-

Be it known that I, EDW'ARD A VVILDT, a citizen of the United States, residing at Long Island City, in the county of Queens and State of New York, have invented a certain new and useful Improvement in Electro-MagneticDoor- Qpeners, of which the following is a specification.

My invention relates to devices for locking the doors of apartmen t-houses and other places, which are adapted to release or unlock and open the door-by the energizing of an electromagnet controlled from one or more distant points. My object is to increase the simplicity of construction and effectiveness in operation of such apparatus; and my invention consists in the novel devices and combinations of devices employed by me to accomplish the above named object, as hereinafter set forth, and claimed.

My invention is illustrated in the accompanying drawings.

Figure l is a front View of portions of a door and door-casing embodying my invention;

Fig. 2, an edge view of the door-casing; Fig. 3, an edge view of the door; Fig. 4, asection of part of the apparatus, looking from above, on line 44 of Fig. 1; Fig. 5, a rear view of the keeper and throwing-plate; and Fig. 6, a top view of the throwing-plate and parts connected therewith.

A is the door, and B a portion of the doorcasing. In a recess in the door-casing is secured a flat metal plate, 0, which supports the mechanism and which has a raised edge, D, upon the side of the casing toward the door. The plate D is recessed at Eand at F.

Upon the plate 0 and in the recess E is placed the keeper for thedoor-latch,which consists of a bar or head, G, carrying at its outer end the striking-roller I, with which the latch is to engage, and having on its inner end the guide-rod H, which slides through a hole in the lug M, extending from the plate 0. The keeper-plate is also provided with a frictionroller, K, working on an inclined surface, N, of the plate 0.

Extending transversely from the keeper G is a short pin, 0, which enters the elongated aperture P, formed in the end of the operatinglever Q, which is pivoted on a standard, B. At its lower end lever Q has a detent or toe,

(no model.)

T, which is adapted to enter a notch at V, near the pivoted end of the controlling-lever W, which extends toward the edge of the doorcasing and plays against a stop-pin, a. The electro-magnet i is attached to the lower portion of the plate 0 and is provided with apivoted armature, 70, whose upper end carries a transverse arm, Z, which engages with the end of lever XV, so as to hold the lever from downward movement until the armature is attracted by the magnet.

It will be understood that the magnet i is included in a circuit from a battery or other suitable source of electricity, which circuit includes one or more push-buttons or other circuit controllers situated at those points from which it is desired to open the door, whereby circuit can be momentarily closed to the magnet at such points.

At thelower end of the lever Q is secured a spiral spring, S, whose other end is attached to a crank-pin, (I, connected by a crank-plate, d, with a vertical spindle, e, which passes across the recess F, having bearings above and below the same, and carries within the recess the hook-shaped throwingplatef. Upon'the spindle e is the coiled spring 9, whose tension is such as to keep the plate f normally closed into the recess F. The spring S thus forms a connection between the throwing-plate and the keeper.

Upon the edge of the door A is placed the sliding latch J, adapted to engage the roller I of the keeper G, and below this the metal plate h, which engages with plate f.

The operation of these devices is asfollows: WVhen the door is in a closed position, the parts are as shown in Fig. 1, thelatch J being in engagement with the roller I of keeper G, whereby the door is locked, and the plate It holding the throwing-platef in its outward position against the tension of spring 9. The spring S is distended, the toe T is in the notch V oflever W, and said lever is held up by the arm Z of armature To. To open the door, circuit is closed to the magnet, as already described, whereupon the armature is attracted, the lever W is released and falls, releasing the rocking lever Q, so that the spring S draws the lower end of said lever forward and draws back the keeper, so as to unlock the door. Since the platef has a constant pressure by the tension of spring 9 against the plate h on the door, such plate f pushes the door open immediately upon its being unlocked. This same movement by which the door is pushed open also resets the parts for the next operation, for the turning motion of spindle g and erank-pin d is communicated through the now relaxed spring S, which thus acts simplyas a rigid connection between the parts to the lever Q, and, pushing the same back, causes it to engage with the lever \V and raises this lever into position to engage again with armature 7:, at the same time moving the keeper G forward into position to engage once more with latch .I. As the keeper is thrown back in opening the door, guided by the rod H, the friction-roller K rides down the incline N, whereby the latch J is permitted to clear the keeper without excessive friction.

In closing the door the catch it pushes the plate f out against the pressure of spring g, aml,turning thepartscdd, distends the spring S, so as to put it in condition to throw the lever Q, the remaining parts having already been returned to operative position. At the same time the latch J engages with. the keeper G and locks the door.

\Vhat I claim is- 1. In an electric dooropener, the combination of the magnet and armature, the movable keeper controlled thereby, the spring throwingplate arranged to bear against the door, a lever attached to said movable keeper, and a connection between said throwing-plate and said lever, whereby the parts are reset by the movements of said throwingplate, substantially as set forth.

2. In an electric doonopener, the combination of the magnet and armature, the sliding keeper leontrolled thereby, the pivoted spring throwing-plate arranged to bear against the door, a lever attached to said sliding keeper, and a connection between said throwing-plate and said lever, whereby the parts are reset by the movement of said throwing-plate, substantiall y as set forth.

3. In an electric door-opener, the combina tion of the magnet and armature, the movable keeper controlled thereby,a spring throwingplate arranged to bear against the door, a lever attached to said keeper, and a spiral spring connecting said lever with said throwingplate, substantially as set forth.

4. In an electric dooropener, the combination of the sliding keeper, the pivoted lever connected therewith, the magnet and armature controlling the movement of said lever, the spring throwing-plate arranged to bear against the door, and the spiral spring connecting said lever with said throwing-plate, substantially as set forth.

5. In an electric doonopener, the combina tion of the sliding keeper, the pivoted lever connectedtherewith, the magnet and armature controlling the movement of said lever, the pivoted throwing-plate, the coiled spring on the spindle of said plate, and the spiral spring and crank-connection between said spindle and said lever, substantially as set forth.

6. In an electric door-opener, the combination of the sliding keeper, the operating-lever connected therewith, the eontrollinglever engaged by said operating-lever, the armature normally holding said controlling-lever from movement, the magnet controlling said arma ture, the spring throwing-plate arranged to bear against the door, and a connection between said throwing-plate and said operatinglever, substantially as set forth.

7. In an electric door-opener, the combination of the sliding keeper, the operating-lever connected therewith, the controllinglever engaged by said operating-lever, the armature normally holding said controlling-lever from movement, the magnet controlling said armature, the spring throwing-plate arranged to bear against the door, and the spiral spring connecting said throwing-plate and said operating'lever, substantially as set forth.

8. In an electric door-opener, the combination, with the magnet, of the sliding keeper, the same having a striking-roller to engage the latch, a friction-roller, and a sliding guide-rod, the spring for withdrawing said keeper, and a detent therefor controlled by said magnet, substantially as set forth.

9. In an electric door-opener, the combination, with the sliding keeper, of the spring for withdrawing the same, the magnet and armature controlling said spring, the friction-roller, and the inclined surface on which said friction-roller bears, substantially as set forth.

10. In an elcctricdooropener, the combination of the sliding keeper, the operatinglever connected therewith, the controllinglever, said operating-lever having a toe normally entering a notch on said controlling-lever, the armature-lever normally engaging said controlling-lever, the magnet controlling said armature-lever, the spring tlu'owingplate, and the spiral spring connecting said throwingplate with said operating-lever, substantially as set forth.

This specification signed and witnessed this 15th day of June, 1888.

EDWARD A. WILDT.

Witnesses:

WILLIAM PELZER, A. V. KIDDLE.

IIO 

